JPH023013B2 - - Google Patents
Info
- Publication number
- JPH023013B2 JPH023013B2 JP59155466A JP15546684A JPH023013B2 JP H023013 B2 JPH023013 B2 JP H023013B2 JP 59155466 A JP59155466 A JP 59155466A JP 15546684 A JP15546684 A JP 15546684A JP H023013 B2 JPH023013 B2 JP H023013B2
- Authority
- JP
- Japan
- Prior art keywords
- oil
- thrust receiving
- annular groove
- lubricating oil
- camshaft
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
- 239000003921 oil Substances 0.000 claims abstract description 55
- 239000010687 lubricating oil Substances 0.000 claims abstract description 29
- 238000005461 lubrication Methods 0.000 abstract description 7
- 238000001816 cooling Methods 0.000 abstract description 6
- 230000000694 effects Effects 0.000 description 3
- 230000037431 insertion Effects 0.000 description 3
- 238000003780 insertion Methods 0.000 description 3
- 238000002485 combustion reaction Methods 0.000 description 2
- 230000000717 retained effect Effects 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
- F01L1/00—Valve-gear or valve arrangements, e.g. lift-valve gear
- F01L1/02—Valve drive
- F01L1/04—Valve drive by means of cams, camshafts, cam discs, eccentrics or the like
- F01L1/047—Camshafts
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01M—LUBRICATING OF MACHINES OR ENGINES IN GENERAL; LUBRICATING INTERNAL COMBUSTION ENGINES; CRANKCASE VENTILATING
- F01M1/00—Pressure lubrication
- F01M1/06—Lubricating systems characterised by the provision therein of crankshafts or connecting rods with lubricant passageways, e.g. bores
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Valve-Gear Or Valve Arrangements (AREA)
- Lubrication Of Internal Combustion Engines (AREA)
- Sliding-Contact Bearings (AREA)
Abstract
Description
【発明の詳細な説明】
〔発明の利用分野〕
本発明は、内燃機関におけるカムシヤフトのス
ラスト受構造に関する。DETAILED DESCRIPTION OF THE INVENTION [Field of Application of the Invention] The present invention relates to a thrust bearing structure for a camshaft in an internal combustion engine.
従来のカムシヤフトのスラスト受構造は、実開
昭59−122423号公報（実願昭58−16369号）に開
示されているように、スラスト受部への潤滑油の
供給をカムシヤフトやロツカアームから飛散する
油滴により行なつており、またスラスト受部の摺
動面が単一の平坦面からなつているため、摺動面
にまき込まれた潤滑油が滞留することなく、すぐ
に摺動面外へ流出してしまい、その結果、スラス
ト受部の潤滑油が不足して潤滑不良を起こし、ス
ラスト受部が摩耗しやすかつた。
The conventional camshaft thrust receiver structure, as disclosed in Japanese Utility Model Application No. 122423/1982 (Utility Application No. 16369/1982), supplies lubricating oil to the thrust receiver by scattering it from the camshaft or rocker arm. This is done using oil droplets, and since the sliding surface of the thrust receiving part is made of a single flat surface, the lubricating oil that has been applied to the sliding surface does not accumulate and is quickly removed from the sliding surface. As a result, there was a shortage of lubricating oil in the thrust receiving part, causing poor lubrication and making the thrust receiving part prone to wear.
本発明の目的は、スラスト受部へ潤滑油を十分
に供給でき、潤滑・冷却性能の良いカムシヤフト
のスラスト受構造を提供することにある。
An object of the present invention is to provide a thrust receiving structure for a camshaft that can sufficiently supply lubricating oil to the thrust receiving section and has good lubrication and cooling performance.
本発明は、シリンダヘツドに回転自在に支持さ
れたカムシヤフトのシリンダヘツド端面より突出
する一端部に環状溝を形成し、該環状溝にカムシ
ヤフト内部の潤滑油通路に連通する油噴出孔を開
口させるとともに、シリンダヘツド端面に固着さ
れ、カムシヤフトを支持するオイルシールリテー
ナに前記環状溝下半部に嵌合するスラスト受部を
形成し、該スラスト受部の摺動面に油溜り部を備
えることにより、スラスト受部に対して強制給油
を行ない、かつ供給された潤滑油がスラスト受部
に保持されるようにしたものである。前記油溜り
部は、スラスト受部の円周方向端部に設けたテー
パ面とスラスト受部の摺動面の途中に設けた油溝
の少なくとも一方で構成することができる。
The present invention provides for forming an annular groove in one end of a camshaft which is rotatably supported by a cylinder head and protruding from an end surface of the cylinder head, and opening an oil jet hole communicating with a lubricating oil passage inside the camshaft in the annular groove. , by forming a thrust receiving part that fits into the lower half of the annular groove in the oil seal retainer fixed to the end face of the cylinder head and supporting the camshaft, and providing an oil reservoir part on the sliding surface of the thrust receiving part, The thrust receiving part is forcibly supplied with oil, and the supplied lubricating oil is retained in the thrust receiving part. The oil reservoir portion can be configured of at least one of a tapered surface provided at a circumferential end of the thrust receiving portion and an oil groove provided midway on a sliding surface of the thrust receiving portion.
以下、本発明の一実施例を第１図〜第４図によ
り説明する。
An embodiment of the present invention will be described below with reference to FIGS. 1 to 4.
まず構成を説明すると、１は内燃機関のシリン
ダヘツド、２は吸・排気弁を開閉するためのカム
シヤフトであり、カムシヤフト２のジヤーナル部
３はシリンダヘツド１の軸受部４に回転自在に支
持されている。カムシヤフト２の内部には潤滑油
通路（オイルギヤラリ）１３が設けられ、ジヤー
ナル部３にはシリンダヘツド１の油孔１６から潤
滑油を取り入れる油溝１４と、該油溝１４と潤滑
油通路１３を連通させる油孔１５が形成されてい
る。 First, to explain the structure, 1 is a cylinder head of an internal combustion engine, 2 is a camshaft for opening and closing intake and exhaust valves, and a journal part 3 of the camshaft 2 is rotatably supported by a bearing part 4 of the cylinder head 1. There is. A lubricating oil passage (oil gear) 13 is provided inside the camshaft 2, and an oil groove 14 that takes in lubricating oil from the oil hole 16 of the cylinder head 1 is provided in the journal portion 3, and the oil groove 14 communicates with the lubricating oil passage 13. An oil hole 15 is formed therein.
カムシヤフトの一端部２ａはシリンダヘツド１
の端面より突出しており、この一端部２ａにカム
シヤフト駆動用スプロケツト５がボルト６および
ワツシヤ７により固着されている。８はオイルシ
ールリテーナ９に保持されたオイルシールであ
り、該オイルシール８はカムシヤフトの一端部２
ａの外周に嵌合され、シリンダヘツド１とスプロ
ケツト５との間の油止めを行なう。オイルシール
リテーナ９はシリンダヘツド１の端面にボルト１
０により固着され、オイルシールリテーナ９とシ
リンダヘツド１の端面との間にはガスケツト１１
が挟圧されている。 One end 2a of the camshaft is connected to the cylinder head 1.
A camshaft driving sprocket 5 is fixed to one end 2a by a bolt 6 and a washer 7. Reference numeral 8 denotes an oil seal held in an oil seal retainer 9, and the oil seal 8 is attached to one end 2 of the camshaft.
It is fitted onto the outer periphery of the cylinder head 1 and the sprocket 5 to prevent oil from forming between the cylinder head 1 and the sprocket 5. The oil seal retainer 9 is attached to the end face of the cylinder head 1 with bolts 1.
0, and a gasket 11 is installed between the oil seal retainer 9 and the end surface of the cylinder head 1.
is being squeezed.
本実施例では、カムシヤフトの一端部２ａに環
状溝１２を形成してある。該環状溝１２はオイル
シールリテーナ９の放射方向の内側に位置するよ
うに配設されており、該環状溝１２の底部にはカ
ムシヤフト２の内部の潤滑油通路１３に連通する
油噴出孔１７が開口している。一方、オイルシー
ルリテーナ９は、カムシヤフトの一端部２ａが遊
嵌される挿入孔１８を有し、該挿入孔１８の下半
部の内縁は放射内方に突出して前記環状溝１２に
嵌合している。すなわち、オイルシールリテーナ
９の挿入孔１８の下半部は上半部よりも曲率半径
が小さく、かつその曲率中心が上半部の曲率中心
より上方に偏位しており、その内縁は環状溝１２
に嵌合するスラスト受部１９を構成している。該
スラスト受部１９の円周方向端部には潤滑油まき
込み用のテーパ面２０が設けられ、また前記環状
溝１２の内側面に接触するスラスト受部１９の摺
動面の途中には油溝２１が放射状に設けられてお
り、本実施例ではこのテーパ面２０と油溝２１を
スラスト受部１９の油溜り部としている。 In this embodiment, an annular groove 12 is formed in one end 2a of the camshaft. The annular groove 12 is arranged to be located inside the oil seal retainer 9 in the radial direction, and an oil jet hole 17 that communicates with the lubricating oil passage 13 inside the camshaft 2 is provided at the bottom of the annular groove 12. It's open. On the other hand, the oil seal retainer 9 has an insertion hole 18 into which one end 2a of the camshaft is loosely fitted, and the inner edge of the lower half of the insertion hole 18 protrudes radially inward and fits into the annular groove 12. ing. That is, the lower half of the insertion hole 18 of the oil seal retainer 9 has a smaller radius of curvature than the upper half, and its center of curvature is offset upward from the center of curvature of the upper half, and its inner edge is formed by the annular groove. 12
A thrust receiving portion 19 is configured to fit into the thrust receiving portion 19. A tapered surface 20 for lubricating oil is provided at the circumferential end of the thrust receiving portion 19, and an oil is provided in the middle of the sliding surface of the thrust receiving portion 19 that contacts the inner surface of the annular groove 12. Grooves 21 are provided radially, and in this embodiment, the tapered surface 20 and oil grooves 21 are used as an oil reservoir of the thrust receiving portion 19.
上記構造において、図示しないオイルポンプに
より圧送された潤滑油はシリンダヘツド１の油孔
１６から油溝１４に入り、ジヤーナル部３と軸受
部４の摺動面を潤滑するとともに、カムシヤフト
２の油孔１５、潤滑油通路１３により導かれた潤
滑油の一部は油噴出孔１７、環状溝１２を経由し
てスラスト受部１９へと供給される。ここで、油
噴出孔１７から環状溝１２内に噴出した潤滑油
は、環状溝１２の内側面に接するスラスト受部１
９のテーパ面２０と油溝２１によりひとまず保持
され、それからスラスト受部１９の摺動面にまき
込まれて行く。したがつて、スラスト受部１９の
摺動面には常に十分な量の潤滑油を供給すること
ができる。 In the above structure, lubricating oil pumped by an oil pump (not shown) enters the oil groove 14 from the oil hole 16 of the cylinder head 1, and lubricates the sliding surfaces of the journal part 3 and the bearing part 4, as well as the oil hole of the camshaft 2. 15. A portion of the lubricating oil guided through the lubricating oil passage 13 is supplied to the thrust receiving portion 19 via the oil jet hole 17 and the annular groove 12. Here, the lubricating oil spouted into the annular groove 12 from the oil jet hole 17 is transferred to the thrust receiving part 1 which is in contact with the inner surface of the annular groove 12.
9 is held by the tapered surface 20 and the oil groove 21 for the time being, and then rolled into the sliding surface of the thrust receiving part 19. Therefore, a sufficient amount of lubricating oil can always be supplied to the sliding surface of the thrust receiving part 19.
スラスト受部１９の潤滑に使われた油はオイル
シール８とオイルシールリテーナ９との間の空所
２３に一時滞留した後、スラスト受部１９に設け
た油戻し孔２２によりシリンダヘツド１側に戻さ
れるようにするとよい。こうすることにより、ス
ラスト受部１９には常に新しい潤滑油が供給さ
れ、潤滑・冷却性能がさらに向上する。 The oil used to lubricate the thrust receiving part 19 temporarily remains in the space 23 between the oil seal 8 and the oil seal retainer 9, and then returns to the cylinder head 1 side through the oil return hole 22 provided in the thrust receiving part 19. It would be good to have it returned. By doing so, new lubricating oil is constantly supplied to the thrust receiving portion 19, further improving the lubrication and cooling performance.
以上は本発明の一実施例について述べたもので
あり、スラスト受部１９の油溜り部としてテーパ
面２０と油溝２１のいずれか一方のみを設けた場
合にもほぼ同様な効果が得られる。 The above description is about one embodiment of the present invention, and substantially the same effect can be obtained even when only one of the tapered surface 20 and the oil groove 21 is provided as the oil reservoir portion of the thrust receiving portion 19.
本発明によれば、カムシヤフトの内部の潤滑油
通路に連通し、カムシヤフトの一端部に形成した
環状溝の底部に開口する油噴出孔により、該環状
溝に嵌合するオイルシールリテーナのスラスト受
部に対して強制給油を行ない、かつ該スラスト受
部に設けた油溜り部により供給された潤滑油を保
持する構成としたため、スラスト受部へ潤滑油を
十分に供給できて潤滑・冷却性能を向上させ、ス
ラスト受部の摺動面の摩耗を防止することができ
る。しかも、オイルシールリテーナにスラスト受
部を設け、かつ、カムシヤフト自体の内部に形成
した潤滑油通路を介して潤滑油を供給する構成で
あるので、潤滑・冷却性能の良いスラスト受構造
を、部品点数をふやさずに容易に実現できるとい
う効果がある。
According to the present invention, the thrust receiving portion of the oil seal retainer that fits into the annular groove is connected to the lubricating oil passage inside the camshaft and is opened at the bottom of the annular groove formed at one end of the camshaft. Since the structure is such that the lubricating oil is forcibly supplied to the thrust receiving part and the supplied lubricating oil is held in the oil reservoir provided in the thrust receiving part, a sufficient amount of lubricating oil can be supplied to the thrust receiving part, improving lubrication and cooling performance. This makes it possible to prevent wear on the sliding surface of the thrust receiver. Moreover, since the oil seal retainer is provided with a thrust receiving part and lubricating oil is supplied through a lubricating oil passage formed inside the camshaft itself, a thrust receiving structure with good lubrication and cooling performance can be achieved with fewer parts. This has the effect of being easily realized without increasing the amount.
第１図は本発明の一実施例を示す側断面図、第
２図はスラスト受部を備えたオイルシールリテー
ナのシリンダヘツド側から見た側面図、第３図は
第２図のＩ−Ｉ線に沿う部分断面図、第４図は同
−線に沿う部分断面図である。
１…シリンダヘツド、２…カムシヤフト、２ａ
…カムシヤフトの一端部、８…オイルシール、９
…オイルシールリテーナ、１２…環状溝、１３…
潤滑油通路、１７…油噴出孔、１９…スラスト受
部、２０，２１…油溜り部（２０：テーパ面、２
１：油溝）、２２…油戻し孔。
FIG. 1 is a side cross-sectional view showing one embodiment of the present invention, FIG. 2 is a side view of an oil seal retainer equipped with a thrust receiving part as seen from the cylinder head side, and FIG. 3 is an I-I in FIG. FIG. 4 is a partial sectional view taken along the same line. 1...Cylinder head, 2...Camshaft, 2a
...One end of the camshaft, 8...Oil seal, 9
...Oil seal retainer, 12...Annular groove, 13...
Lubricating oil passage, 17... Oil spout hole, 19... Thrust receiving part, 20, 21... Oil reservoir part (20: Tapered surface, 2
1: oil groove), 22...oil return hole.
Claims (1)
シヤフトのシリンダヘツド端面より突出する一端
部に環状溝を形成し、該環状溝にカムシヤフト内
部の潤滑油通路に連通する油噴出孔を開口させる
とともに、シリンダヘツド端面に固着され、カム
シヤフトを支持するオイルシールリテーナに前記
環状溝下半部に嵌合するスラスト受部を形成し、
該スラスト受部の摺動面に油溜り部を備えたこと
を特徴とするカムシヤフトのスラスト受構造。1. An annular groove is formed in one end of the camshaft which is rotatably supported by the cylinder head and projects from the end surface of the cylinder head, and an oil spout hole communicating with the lubricating oil passage inside the camshaft is opened in the annular groove. forming a thrust receiving part that fits into the lower half of the annular groove on an oil seal retainer that is fixed to the end face and supports the camshaft;
A thrust receiver structure for a camshaft, characterized in that the sliding surface of the thrust receiver is provided with an oil reservoir.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15546684A JPS6134307A (en) | 1984-07-27 | 1984-07-27 | Thrust receiving structure for cam shaft |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15546684A JPS6134307A (en) | 1984-07-27 | 1984-07-27 | Thrust receiving structure for cam shaft |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6134307A JPS6134307A (en) | 1986-02-18 |
| JPH023013B2 true JPH023013B2 (en) | 1990-01-22 |
Family
ID=15606665
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP15546684A Granted JPS6134307A (en) | 1984-07-27 | 1984-07-27 | Thrust receiving structure for cam shaft |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6134307A (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP6131981B2 (en) * | 2015-03-30 | 2017-05-24 | トヨタ自動車株式会社 | Cam cap |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5847113A (en) * | 1981-09-17 | 1983-03-18 | Mazda Motor Corp | Motion valve system lubricator in engine |
-
1984
- 1984-07-27 JP JP15546684A patent/JPS6134307A/en active Granted
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5847113A (en) * | 1981-09-17 | 1983-03-18 | Mazda Motor Corp | Motion valve system lubricator in engine |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6134307A (en) | 1986-02-18 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US4777842A (en) | Structure of camshaft bearing | |
| JPH09151993A (en) | Bearing part lubrication structure of balancer shaft | |
| JPS60209616A (en) | Lubricating apparatus for ohc engine | |
| US4991549A (en) | Camshaft lubricating system for engine | |
| JPH023013B2 (en) | ||
| JP3470609B2 (en) | Internal combustion engine lubrication system | |
| US5325826A (en) | Journal bearing oil diverter | |
| JPH0122884Y2 (en) | ||
| JPS5931997Y2 (en) | Crank pin lubricating device | |
| EP0377829A2 (en) | Camshaft lubrication system for an internal-combustion engine | |
| JPH06330719A (en) | Lubricator of internal combustion engine | |
| JPS6210409Y2 (en) | ||
| JPS6126566Y2 (en) | ||
| CN218408197U (en) | Bearing cap assembly | |
| JP2542525Y2 (en) | Engine cylinder head structure | |
| JPS601206Y2 (en) | Lubricating device for internal combustion engine intake/exhaust valve opening/closing mechanism | |
| JPS6226565Y2 (en) | ||
| JPS5842562Y2 (en) | Lubricating device for oil pump drive part in internal combustion engine | |
| JP2546615Y2 (en) | Cam lubrication device for DOHC engine | |
| JPS6244083Y2 (en) | ||
| JPS6139051Y2 (en) | ||
| JPS6210408Y2 (en) | ||
| JPH0113766Y2 (en) | ||
| CN2240611Y (en) | Oil seal stop | |
| JPS6036727Y2 (en) | Engine starter bearing lubrication system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |